Hot-air heating system.



No. 811,089. PATENTED JAN. 30,1906. W. H. RIGKER. HOT AIR HEATING SYSTEM.

APPLICATION FILED AUG. 5, 1905.

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APPLICATION FILED AUG. 5, 1905.

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Be it known that T, WILLIAM H. Thomas, a

citizen of the UnitedStates of America, and

0f the drawings, Figure 1 represents a cen' tral vertical section; and Fig. 2 represents a transverse section of the same, the cutting plane being on line 2 2 on Fig, 1 and looking in the direction of the arrow.

Similar characters designate like parts throughout the figures of the drawings.

@ Tn the drawings, represents a front shell of a furnace-provided wlth suitable doors 11 to secure access to the interior of the fire-pot and another door 12 giving access to the ashpit 13. Above the ash pit 13, on suitable supports 14, are mounted members 15, of firebrick or other suitable material, forming a suitable floor to the fire-pot 16. Said members are separated at one or more points to form an opening 17. The upper surfaces of the members 15 are, inclined downwardly, as shown at 18, toward these 0' enings 17. In

- the center. of the fire-pot is ocated a retort 19, of fire-brick or other suitable material,

its side walls provided w1th a lurality o openings 20, passing therethroug and communicatin withQthe fire-pot 16. .The bot-' tom of sai retort 19 is provided with a screw conveyer 21,, extending downwardly toward the rear of the furnace through a suitable said retort being open at the top and having tube 22 into a coal-pit 23, separated from the fire-pot by a wall 24. T e coal-pit23 is supplied with coal by means of a screw conveyer25.-' (Shown in Fig. 1.-) -VVhere a plurality of furnaces are used, this screw conveyer will extend from" one to the other and convey coal to the various coalits.' The screw 21 is provided with a bevele gear 26, meshing with a companion gear 27 on the shaft 28, rovided with a squared end 29, by which t e screw may be Specification of Letters Patent. Application filed August 5,1905. Serial No. 272.811.

Patented J an. 30, 1906,

operated to convey coal from the pit 23 to the retort 19. This retort is intended to be filled with coal-dust and fine coal to the top thereof, over the u per edge of which the coaldust and fine coa will be dropped onto the floor of the fire-pot into a heap, as indicated in dotted lines in the drawings. The mass of coal-dust outside of the retort is intended to be ignited, and the heat from the same will act upon the combustible within the retort 19 and cause gas to' be generated therein,

which gas will pass throu h the plurality of holes 20 in the walls of said retort to assist in said combustion. To provide a further supply of gas, a pipe 30 is provided extending downward from the top of said furnace and zigzagging above the fire-pot to provide suitable heating-surface therefor and finally terminating at 31 in said retort. The oil that passes through this pipe will become thorou hly heated and be formed into gas, which wil be ejected from the outlet 31 in the retort, from which it will pass through the openings :20 to still further assist in the combustion.

The sidewalls 32 of the fire-pot are made of fire-brick or other suitable material and are surrounded on all sides by hot-air assages 33, which communicate at the top 0 the furnace with the hot-air chamber 34.

Above the retort l9 and extending between the front and rear air-passages is an air-shaft 35, made of fire-brick or other suitable material being burned. Above the fire-pot 19 is a.

boiler 38, extending from the front to the rear of said furnaces. This boiler may be of any suitable type and consist of an inlet 39 and outlet 40, between which are interposed suitable steam-chambers 41 and pipes 42.

The pipes'42 pass through baffle-plates 43 and 44 which direct the heat from the fire upward through the spaces between the pipes 42 over the bafielate 44, downward, and then under the ba s-plate 43 to the chimney 45.

The airassage 34 is rovided with an in- I lot 46, which supplies t e air thereto to be heated and whic will pass downwardly by forced draft or otherwise through the air-passages 33 and through the various openings into the fire-pot. The doors 11 are provided with any suitable slides 47, by which fresh air may be supplied to the fire when desired. These doors 11 are adapted for use only when it is desired to secure access to the interior of .plates 49 on either side of said openings 17 to grind the slag or ashes which may collect upon the floor oi the fire-pot and cause it to he pulverized as it passes downward through the openings 17 into the ash-pit 13.

' The openings 50 are adapted for use to stir the fire when necessary or for use to start the same when desired. 7

This makes every convenient form of heating apparatus which gives an intense heat and is adapted especially to burn coal-dust and other material ordinarily waste.

It is believed that the operation of the in vention will be thoroughly understood without any further description.

Having thus described my invention, I claim- I 1. in a heating system, the combin ation of a fire-pot, a central retort therein extending upwardly from the floor of said tire-pot into which it opens at the top and provided means for emitting gas from the interior there-- or throughthe side walls, and means for supplying said retort with a combustible capable of generating gas. V

In a heating system, the combination or a Ere-pot, a central retorttherein opening at 81 ose ward openin s therein, of a retort interposed--- between sai openin s extending upwardly from the floor of sairv fire-pot and provided with means for emitting as from the inte-' rior thereof through the si e walls, and means for introducing into said retort combustibles capable of generating gas.

i. In a heating system, the combination with a fire-pot having a solid floor inclined toward openin s therein, of a retort interposed between said openin s extending upwardly from the floor of sai: fire-pot and. provided with means for emitting as from the interior thereof through the si ewalls, and means for supplying combustibles through the bottom of said retort.

5. In a heating system, the combination of a fire-pot provided with means for sup plying air to said fire-pot through its side walls and having a solid floor inclined toward openings through which the ashes may be ejected, a central retort for said fire-pot provided with perforations: in its side walls for, the emission of gas from the interior thereof, and means for supplying cornbustibles through the bottom of the retort.

Signed by me at Boston, Massachusetts, this 2d day of August, 1905.

WILLIAM H. moisten.

VVitnpsses:

WALTER E. Lomnnnn, EDNA C. CLEVELAND. 

